KR20180097674A - Memory reclaim method and apparatus - Google Patents

Abstract

The present invention relates to the field of computer technology, and more particularly, to a method and apparatus for memory reclaim, which solves the problem of application installation that is likely to occur by not performing memory reclaim at an appropriate time. The memory reclaim method provided in the present application includes: monitoring user operation and usage information and memory occupancy information of an application installed in a terminal; And a user operation and use information of an application currently being executed in the terminal if the memory reclaim condition is determined to be satisfied according to at least one of user operation and usage information or memory occupancy information of the application installed in the terminal, Determining an application to be memory reclaimed from currently running applications in the terminal according to the memory occupancy information, and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode.

Description

Memory reclaim method and apparatus

This application claims priority to Chinese patent application No. 201511032537.7 (titled "Memory reclaim method and apparatus") filed on December 31, 2015, the entire contents of which are incorporated herein by reference in their entirety do.

The present application relates to computer technology, and more particularly, to a memory reclaim method and apparatus.

In consideration of the manufacturing cost, the memory capacity of the terminal device is usually relatively small, and in most cases, it is 1-2G. Currently, the kernel meets the requirements of an application program to apply for memory as much as possible. As a result, in a terminal product such as a mobile phone, an application such as a camera that consumes a relatively large memory is delayed because the application can not apply for an adequate memory (for example, an application requiring 300 MB to 500 MB momentarily) Even during startup or execution, the application is repeatedly turned off and restarted.

The Linux system's memory reclaim policy triggers a memory reclaim when there is insufficient memory. For example, when an application is started or switched to a foreground interface, the application process in the user mode submits the memory to the kernel mode, and if the memory that the application wants to occupy is larger than the system free memory, Is triggered. Specifically, the memory that is used at the lowest frequency recently using the Least Recently Used (LRU) algorithm is selected for reclaim. Memory reclaim may also be performed using in-memory compression, same page merging, memory defragmentation, and the like. The Android system triggers a memory reclaim in kernel mode by setting the free memory level in kernel mode. For example, if the memory is less than n ₁ MB, the application process with the lowest priority is terminated, and if the memory is still less than n ₂ (n ₁ <n ₂ ) MB, do.

According to the above two memory reclaim policies, memory reclaim is only triggered in kernel mode when it is recognized that the available free memory is relatively small. Therefore, the following may occur, that is, a memory with a relatively low utilization rate in the system can not be released at an appropriate time. If the memory reclaim is triggered after recognizing that the free memory is insufficient, the following may occur: That is, the currently running application that has failed to timely request the required memory is delayed.

The present application provides a memory reclaim method and apparatus for resolving a problem of application stalling which is likely to be caused by a memory reclaim that is not performed in time.

The present application provides a memory reclaim method, comprising: monitoring user operation and usage information and memory occupancy information of an application installed in a terminal; And a user operation and use information of an application currently being executed in the terminal if the memory reclaim condition is determined to be satisfied according to at least one of user operation and usage information or memory occupancy information of the application installed in the terminal, Determining an application to be memory reclaimed among currently running applications in the terminal according to the memory occupancy information and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode, .

In the present application, memory reclaim is performed proactively by monitoring the user operation and usage status and memory occupancy status of the application installed in the terminal in the user mode, whereby the application is frequently operated and used by the user, When occupying a large memory, the frequency of memory reclaim increases, thereby ensuring normal use of the memory.

In one embodiment, determining that a memory reclaim condition is currently satisfied, in accordance with at least one of user operation and usage information and memory occupancy information of an application installed in the terminal is determined based on at least one of a user operation Determining a memory reclaim time interval according to usage information and memory occupancy information; And determining that the memory reclaim condition is currently satisfied when the current time has reached a memory reclaim time indicated by the memory reclaim time interval.

In this implementation, the memory reclaim time interval is first determined according to the regularity of application usage by the user, and then the memory reclaim time interval, which is indicated by the memory reclaim time interval, . In this way, since the planned reclaim is performed on the memory, the available free memory in the terminal can be maintained at a relatively desirable level.

In the above-described embodiment, a selectable method of determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal includes selecting at least one Individually determining user operation and use information and memory occupancy information in each of the predetermined time segments; And for each of the at least one predetermined time segment, a memory reclaim time in each time segment, in accordance with user operation and usage information and memory occupancy information in the respective time segment of an application installed in the terminal, And determining the interval individually.

The frequency of operation and use of the application by the user differs depending on the different time segments. Thus, in this manner, different memory reclaim time intervals may be used in different time segments. This also improves the memory reclaim timeline and avoids wasting system resources due to frequent execution of unnecessary memory reclaim processes.

In yet another embodiment, determining that a memory reclaim condition is currently satisfied, in accordance with memory occupancy information of an application installed in the terminal, may include determining that the system free memory is less than a predetermined first threshold, And determining that the condition is currently satisfied.

In this way, memory shortage can be avoided to some extent.

In yet another embodiment, determining that a memory reclaim condition is currently satisfied, in accordance with user operation and usage information and memory occupancy information of an application installed in the terminal, means that the application is started or switched to the foreground interface Determining whether to perform a memory reclaim according to the memory occupancy information of the application and the size of the system free memory; And if it is necessary to perform a memory reclaim, determining that the memory reclaim condition is currently satisfied.

The newly started application or the application that has been switched to the foreground interface is an application that the user normally wants to use. In this way, normal execution of the newly started application or the application converted to the foreground interface is guaranteed, .

In yet another embodiment, determining that the memory reclaim condition is currently satisfied in accordance with user operation and usage information of an application installed in the terminal may include determining whether the number of currently running applications in the background is greater than a predetermined And if it exceeds the allowed amount, determining that the memory reclaim condition is currently satisfied.

Here, the allowed number of applications that can be executed in the background can be set in the time interval according to the size of the current free memory. Applications running in the background are typically not currently used by users, so unnecessary excessive memory occupation can be avoided by limiting the quantity of these applications.

In the above-described implementation, a selectable method of determining the application to be memory-reclaimed and performing a memory reclaim by invoking a memory reclaim interface provided by kernel mode is to select a memory reclaim Selecting an application that is not currently operated or used by a user as an application currently running on the terminal according to a pre-stored priority order of the application, and if the current time is a high-probability use time segment of the selected application , Wherein the high probability usage time segment of the application is determined based on user operation and usage information of the application and if the current time is not within the high probability usage time segment of the selected application Determining that the selected application is an application to be memory reclaimed and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And repeating the steps until the memory reclaim termination condition is satisfied.

In this way, the memory of the application with a relatively low priority (this application is usually not an application frequently used by the user) is preferentially selected for reclaim. The current time is not in the application's high-probability runtime segment, which can improve system performance and improve the user experience.

In the above-described embodiment, the memory reclaim termination condition is satisfied under the following conditions:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

In addition, the priority order of applications that need memory reclaim is the following:

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And

Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;

.

In another embodiment, if it is determined that the memory reclaim condition is satisfied according to user operation and usage information of an application installed in the terminal, a memory reclaim interface provided by the kernel mode is called to request a memory reclaim Wherein the determining step determines that the memory reclaim condition is currently satisfied if it is detected that the period in which the application at the terminal remains in the background exceeds a predetermined period, And reclaiming the memory of the application whose period of stay in the background exceeds the predetermined period.

Here, an application in which a residence time in the background is relatively long is an application that is not normally operated by the user during the current period of time, and the memory of the application is released, thereby providing an application requiring more memory, thereby improving the effective utilization rate of the memory .

The present application provides a memory reclaim device,

A determination module configured to monitor user operation and use information and memory occupancy information of an application installed in the terminal in a user mode; And

If the memory reclaim condition is determined to be satisfied at present according to at least one of the user operation and use information or memory occupancy information of the application installed in the terminal, user operation and use information of an application currently being executed in the terminal, A memory reclaim module configured to determine an application to be memory reclaimed from currently running applications in the terminal according to the memory occupancy information and to perform a memory reclaim by calling a memory reclaim interface provided by the kernel mode,

.

In the present application, memory reclaim is performed proactively by monitoring the user operation and usage status and memory occupancy status of the application installed in the terminal in the user mode, whereby the application is frequently operated and used by the user, When occupying a large memory, the frequency of memory reclaim increases, thereby ensuring normal use of the memory.

In one implementation, the memory reclaim module is, in particular,

Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal, and when the current time reaches a memory reclaim time indicated by the memory reclaim time interval, It is configured to determine that the memory reclaim condition is currently satisfied.

In this implementation, the memory reclaim time interval is first determined according to the regularity of application usage by the user, and then the memory reclaim time interval, which is indicated by the memory reclaim time interval, . In this way, since the planned reclaim is performed on the memory, the available free memory in the terminal can be maintained at a relatively desirable level.

In the above-described embodiment, a selectable method for determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal includes at least one preset Determining, at each of the time segments, user operation and usage information and memory occupancy information separately; And for each of the at least one predetermined time segment, a memory reclaim time in each time segment, in accordance with user operation and usage information and memory occupancy information in the respective time segment of an application installed in the terminal, And determining the interval individually.

The frequency of operation and use of applications that are in use depends on different time segments. Thus, in this manner, different memory reclaim time intervals may be used in different time segments. This also improves the memory reclaim timeline and avoids wasting system resources due to frequent execution of unnecessary memory reclaim processes.

In another embodiment, the memory reclaim module is configured to determine that the memory reclaim condition is currently satisfied, in particular if it is determined that the system free memory is less than a predetermined first threshold.

In this way, memory shortages can be avoided.

In yet another embodiment, the memory reclaim module is, in particular,

When it is detected that the application is started or switched to the foreground interface, it is determined whether to perform the memory reclaim according to the memory occupancy information of the application and the size of the system free memory. If the memory reclaim is to be performed, It is configured to determine that the memory reclaim condition is currently satisfied.

The newly started application or the application that has been switched to the foreground interface is an application that the user normally wants to use. In this way, normal execution of the newly started application or the application converted to the foreground interface is guaranteed, .

In another embodiment, the memory reclaim module specifically determines that the memory reclaim condition is currently satisfied if the number of applications currently running in the background exceeds a predetermined allowable number of applications that can be executed in the background .

Here, the allowed number of applications that can be executed in the background can be set in the time interval according to the size of the current free memory. Applications running in the background are typically not currently used by users, so unnecessary excessive memory occupation can be avoided by limiting the quantity of these applications.

In the above-described implementation, a selectable method for determining an application to be memory reclaimed and performing a memory reclaim by invoking a memory reclaim interface provided by kernel mode is to select an application to be memory reclaimed Selecting an application that is not operated or used by a user as an application currently running in the terminal according to a pre-stored priority order, and if the current time is within a high-probability use time segment of the selected application Wherein the high probability usage time segment of the application is determined based on user operation and usage information of the application and if the current time is not in the high probability usage time segment of the selected application, Selected applications comprising: determining that the application to the reclaim memory, and perform memory reclaim by calling reclaim memory interface provided by the kernel-mode; And repeating the steps until the memory reclaim termination condition is satisfied.

In this way, the memory of the application with a relatively low priority (this application is usually not an application frequently used by the user) is preferentially selected for reclaim. The current time is not in the application's high-probability runtime segment, which can improve system performance and improve the user experience.

In the above-described embodiment, the memory reclaim termination condition is satisfied under the following conditions:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

In addition, the priority order of applications that need memory reclaim is the following:

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And

Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;

.

In addition, the memory reclaim module is, specifically,

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And determining a memory re-claim priority order of the application in each group according to the use frequency range corresponding to each group, the application in the same group having the same priority order And is configured to set a ranking order.

In another embodiment, the memory reclaim module determines that the memory reclaim condition is currently satisfied when it is detected that the period of time the application in the terminal remains in the background exceeds a predetermined period, The memory reclaim interface provided by the kernel mode is called so that the memory of the application whose period of stay in the background exceeds the predetermined period is reclaimed.

The present application provides user equipment, which includes a processor, memory and a bus. This memory stores execution commands and also includes an internal memory device and an external memory device. The internal memory device is also referred to as an internal memory, and is configured to temporarily store operation data of the processor and data exchanged with an external memory such as a hard disk. The processor exchanges data with the external memory using the internal memory device, and when the user equipment is executed, the processor and the memory communicate with each other using the bus so that the processor executes the following commands in user mode:

Monitoring user operation and usage information and memory occupancy information of an application installed in the terminal; And

If the memory reclaim condition is determined to be satisfied at present according to at least one of the user operation and use information or memory occupancy information of the application installed in the terminal, user operation and use information of an application currently being executed in the terminal, Determining an application to be memory reclaimed among the applications currently being executed in the terminal according to the memory occupancy information, and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode.

In the present application, memory reclaim is performed proactively by monitoring the user operation and usage status and memory occupancy status of the application installed in the terminal in the user mode, whereby the application is frequently operated and used by the user, When occupying a large memory, the frequency of memory reclaim increases, thereby ensuring normal use of the memory.

In one implementation, determining that a memory reclaim condition is currently satisfied, in accordance with at least one of user operation and usage information and memory occupancy information of an application installed in the terminal in an instruction executed by the process, Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal; And determining that the memory reclaim condition is currently satisfied when the current time has reached a memory reclaim time indicated by the memory reclaim time interval.

In this implementation, the memory reclaim time interval is first determined according to the regularity of application usage by the user, and then the memory reclaim time interval, which is indicated by the memory reclaim time interval, . In this way, since the planned reclaim is performed on the memory, the available free memory in the terminal can be maintained at a relatively desirable level.

In the above-described embodiment, in the instruction executed by the processor, the selectable method of determining the memory reclaim time interval according to the user operation and use information of the application installed in the terminal and the memory occupancy information, Individually determining user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the application; And for each of the at least one predetermined time segment, a memory reclaim time in each time segment, in accordance with user operation and usage information and memory occupancy information in the respective time segment of an application installed in the terminal, And determining the interval individually.

The frequency of operation and use of applications that are in use depends on different time segments. Thus, in this manner, different memory reclaim time intervals may be used in different time segments. This also improves the memory reclaim timeline and avoids wasting system resources due to frequent execution of unnecessary memory reclaim processes.

In another embodiment, in the instructions executed by the processor, determining that a memory reclaim condition is currently satisfied, in accordance with memory occupancy information of an application installed in the terminal, means that the system free memory is less than a predetermined first threshold Determining that the memory reclaim condition is currently satisfied.

In this way, memory shortage can be avoided to some extent.

In yet another embodiment, determining that a memory reclaim condition is currently satisfied, in accordance with user operation and usage information and memory occupancy information of an application installed in the terminal, in an instruction executed by the processor, Determining whether to perform a memory reclaim according to the memory occupancy information of the application and the size of the system free memory when the switching to the foreground interface is detected; And if it is necessary to perform a memory reclaim, determining that the memory reclaim condition is currently satisfied.

The newly started application or the application that has been switched to the foreground interface is an application that the user normally wants to use. In this way, normal execution of the newly started application or the application converted to the foreground interface is guaranteed, .

In another embodiment, determining that the memory reclaim condition is currently satisfied, in accordance with user operation and usage information of an application installed in the terminal, in an instruction executed by the processor means that the number of currently executing applications in the background is Determining that the memory reclaim condition is currently satisfied if the predetermined allowable quantity of applications that can be executed in the background is exceeded.

Here, the allowed number of applications that can be executed in the background can be set in the time interval according to the size of the current free memory. Applications running in the background are typically not currently used by users, so unnecessary excessive memory occupation can be avoided by limiting the quantity of these applications.

In the above-described implementation, in an instruction executed by a processor, a selectable method of determining an application to be subjected to the memory reclaim and performing a memory reclaim by invoking a memory reclaim interface provided by the kernel mode Selects an application that is not operated or used by a user as an application that is currently being executed in the terminal according to a pre-stored priority order of applications to be memory-reclaimed, and the current time is the high- Probability use time segment, wherein the high-probability lapse time segment of the application is determined based on user operation and usage information of the application, and wherein the current time is a high probability of the selected application Determining that the selected application is a memory reclaim application if it is not in the use time segment and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And repeating the steps until the memory reclaim termination condition is satisfied.

In this way, the memory of the application with a relatively low priority (this application is usually not an application frequently used by the user) is preferentially selected for reclaim. The current time is not in the application's high-probability runtime segment, which can improve system performance and improve the user experience.

In the above-described embodiment, the memory reclaim termination condition is satisfied under the following conditions:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

In addition, in an instruction executed by the processor, the order of priority of applications that need to reclaim memory is the following:

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And

Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;

.

In another embodiment, if it is determined in the instruction executed by the processor that the memory reclaim condition is satisfied in accordance with the user operation and usage information of the application installed in the terminal, the memory reclaim provided by the kernel mode Wherein the step of determining whether the memory reclaim condition satisfies the memory reclaim condition is satisfied when the period in which the application in the terminal exceeds the predetermined period of time is determined to be in the background, Reclaiming a memory of an application whose period of stay in the background exceeds a predetermined period by calling a memory reclaim interface provided by the memory reclaim interface.

Here, an application in which a residence time in the background is relatively long is an application that is not normally operated by the user during the current period of time, and the memory of the application is released, thereby providing an application requiring more memory, thereby improving the effective utilization rate of the memory .

1 is a schematic diagram of a memory reclaim according to the present application.
2 is a flowchart of a memory reclaim method according to the first embodiment of the present application.
3 is a flowchart of a memory reclaim method according to the second embodiment of the present application.
4 is a flowchart of a memory reclaim method according to the third embodiment of the present application.
5 is a schematic configuration diagram of a memory reclaim apparatus 50 according to an embodiment of the present application.
6 is a schematic block diagram of a user equipment 60 according to an embodiment of the present application.
7 is a schematic configuration diagram of the terminal device 700 according to the present application.
8 is a schematic configuration diagram of a terminal 800 according to an embodiment of the present application.

Referring to Figure 1, Figure 1 is a schematic diagram of a memory reclaim according to the present application. In the present application, the memory reclaim is performed by using the memory reclaim interface provided by the kernel mode and by executing the memory reclaim policy in the user mode. Specifically, the memory reclaim is triggered by monitoring user operation and usage information of the application installed in the terminal, and memory occupancy information. After the memory reclaim condition is satisfied, an application to be subjected to memory reclaim is selected from an application currently executing in the terminal according to user operation and usage information and memory occupancy information of an application currently running in the terminal, The memory reclaim is performed by invoking the memory reclaim interface provided by the user in user mode. In the present application, when the application is frequently operated and used by the user and occupies a relatively large memory, by performing in advance in the user mode by monitoring the memory occupation information of the application and the user operation and use information, Memory reclaim frequency increases and guarantees timely memory reclaim.

Embodiments of the present application will now be described in more detail with reference to the accompanying drawings of the present application.

Example 1

Referring to Fig. 2, Fig. 2 is a flow chart of a memory reclaim method according to embodiment 1 of the present application, which performs the following steps in a user mode.

S201: User operation and usage information of the application installed in the terminal and memory occupancy information are monitored.

Here, the memory occupancy information includes the size of the memory occupied when the application is executed, and the user operation and use information of the application includes the frequency of use of the application by the user, the use time segment, the use period and the like.

In a specific implementation, the execution state of each application in the terminal system and the amount of memory occupied when the application is executed can be monitored in real time using the monitoring process in the user mode. The frequency of use of the application by the user, the usage time segment, the usage period, and the like can be determined using the execution state of the application obtained by the monitoring. Here, the usage time segment in which the user uses the application is a time segment in which the user uses the application among a plurality of preset time segments, or an actual time from the moment when the user starts operating the application to the moment when the user completes the application operation Segment.

Here, monitoring the execution status of each application on the terminal system may include an application start status, an application end status, a status in which the application is switched from the background to the foreground interface, a status in which the foreground interface is switched in the background have. Specifically, the monitoring process can use the query to obtain the above-described execution state of the application using the query interface provided by the proc file system.

In a specific implementation, for different applications, the manner of collecting statistics on user operations and usage information of the application may be different. For example, for applications (e.g., WeChat or Calendar) that need to be manipulated at the foreground interface by the user, the time at which the application starts or switches to the foreground interface is the time And the time when the application is terminated or switched to the background for execution can be used as a time when the user has finished operating the application. For an application (e.g., downloading software) in the foreground interface that the user does not always have to manipulate, the time at which the application starts can be used as the time when the user starts to operate the application, The usage frequency, the usage time segment, the usage period, etc., in which the user uses the application, can be calculated based on the time at which the user starts operating the application and the time at which the user ends the application operation It can be decided according to one hour.

S202: It is determined whether or not the memory reclaim condition is currently satisfied according to at least one of the user operation and usage information and the memory occupancy information of the application installed in the terminal. If the memory reclaim condition is currently satisfied, If the memory reclaim condition is not satisfied at present, the process returns to step S201.

In a specific implementation, the conditions that trigger the memory reclaim in the user mode may be set according to actual requirements. For example, the memory reclaim time interval may be determined according to the user operation and usage information and memory occupancy information of the application installed in the terminal, and the memory reclaim may execute the planned memory reclaim according to the preset memory recycle time interval So that the free memory available in the terminal is maintained at a relatively good level. Here, there may be one or more preset memory reclaim time intervals. For example, when the user is relatively stable in both the frequency of use of the application and the occupancy of the memory in the whole day, only one memory reclaim time interval can be set. Alternatively, if the user has intensively used the application in only one time segment for a day and the frequency of using the application is stable, then the memory reclaim time interval may be set only in this time segment, No claims are made. If the frequency with which the user uses the application varies greatly in different time segments of the day, a memory reclaim is triggered when the system free memory is less than the threshold (the memory reclaim is triggered according to the memory occupancy information of the application installed in the terminal) ; When an application is started or when switching to the foreground interface is detected, a memory reclaim is triggered depending on the memory occupancy information of the application and the size of the free memory of the system (the memory reclaim may be triggered by the user operation and usage information And memory occupancy information); Or when the period of time in which the application of the terminal remains in the background exceeds a predetermined period, a memory reclaim is triggered (the memory reclaim is triggered according to the user operation and usage information of the application).

S203: Determines an application to be subjected to memory reclaim among applications currently being executed in the terminal, based on the user operation and usage information of the application and the memory occupancy information during execution of the terminal at the terminal, Perform memory reclaim by calling the interface.

Here, the application installed in the terminal in steps S201 and S202 includes the application currently being executed in the terminal in step S203. In addition to the application currently being executed in the terminal in step S203, the application installed in the terminal further includes an application that is currently in a terminated state.

In a specific implementation, a memory reclaim program in kernel mode is called to execute a memory reclaim in user mode using a memory reclaim interface provided by kernel mode. The memory reclaim interface is implemented based on systems such as the linux procfs file system or the linux sysfs file system.

In Linux systems, existing memory reclaim management in kernel mode is implemented based on the LRU algorithm. In conventional memory reclaim management, the memory occupied by the application is divided into two main types: an anonymous page (such as memory allocated by the dynamic memory allocation (malloc) function), and a file page page (such as memory allocated during file read and write). According to the LRU algorithm, recently unused memory is put into a linked list, which is reduced each time a reclaim is performed, and a portion of the memory page (which is usually the page cache) Claim. The default function used for memory reclaim in kernel mode is try_to_free_pages (). In the present application, the interface of the function is exposed to the user mode for invocation. In user mode, it is implemented based on the memory reclaim policy provided in this application and by calling the interface of the function.

Example 2

Hereinafter, a preferred embodiment of the present application will be described, which includes a step of determining a memory reclaim time interval by collecting statistics on user operation and usage information and memory occupancy information of an application installed in the terminal, And performing a memory reclaim based on the memory reclaim.

Referring to FIG. 3, FIG. 3 is a flowchart of a memory reclaim method according to Embodiment 2 of the present application, which executes the next step in a user mode.

S301: User operation and usage information and memory occupancy information of an application installed in the terminal are monitored.

In a specific implementation, statistics on memory occupancy information, such as user usage and usage information of the application, such as frequency of use and usage time segments for which the user is using the application, and the size of memory occupied when the application is executed, And is collected by monitoring the execution status of each application of the terminal system in the user mode.

S302: The memory reclaim time interval is determined according to the user operation and usage information and memory occupancy information of the application installed in the terminal.

Here, the memory reclaim time interval may be determined according to the user operation and usage information and memory occupancy information of the application obtained by the statistical collection in step S301. There may be more than one memory reclaim time interval. For example, only one memory reclaim time interval may be set if the frequency of use and memory occupancy by a user during a day is relatively constant. If the frequency of use of the application by the user is different in different time segments of the day, different memory reclaim time intervals may be used in different time segments of the day. For example, a memory reclaim may be performed more frequently in a time segment where an application is frequently used and a relatively large amount of memory is occupied. Conversely, memory reclaims can be performed less frequently in time segments where applications are not used often and relatively small amounts of memory are occupied.

In a specific implementation, a plurality of time segments may be preset according to experience. In the preset time segment, the user operation and usage information of the application installed in the terminal and the memory occupancy information are determined. The memory reclaim time interval in each predetermined time segment is determined according to the user operation and usage information and memory occupancy information of the application installed in the terminal in the predetermined time segment.

For example, a day is used as a unit, and 9: 00-17: 00, 17: 00-23: 00 and 23: 00-9: 00 are set in advance as various time segments. Statistical values of user operation and usage information and memory occupancy information of the application in various preset time segments are respectively collected. For example, in the time segment 17: 00-23: 00, the user uses the application more frequently, the memory occupied by the application is also the largest, and the memory reclaim time interval in this time segment is set to 0.5 hours . At time segment 9: 00-17: 00, the frequency with which the user uses the application is medium, the size of the memory occupied is also medium, and the memory reclaim time interval in this time segment can be set to one hour have. At time segment 23: 00-9: 00, the user has the least use of the application, the occupied memory size is also the smallest, and the memory reclaim time interval in this time segment can be set to three hours. In another example, different memory reclaim time intervals are set for business and non-business days, respectively, taking into account differences between application usage statistics at work and non-business days of the week. For example, the frequency with which a user uses an application on Saturday and Sunday is significantly higher than the frequency with which the application is used on a business day. The above memory reclaim time interval can of course be used from Monday to Friday, and the memory reclaim frequency increases on Saturday and Sunday. For example, the above-mentioned memory reclaim time intervals at time segments 9: 00-17: 00, 17: 00-23: 00, and 23: 00-9: 00 are halved on Saturdays and Sundays, respectively. That is, the memory reclaim time interval at time segment 17: 00-23: 00 is set to 0.25 hours, the memory reclaim time interval at time segment 9: 00-17: 00 is set to 0.5 hour, The memory reclaim time interval at 23: 00-9: 00 is set to 1.5 hours.

S303: If it is determined that it is necessary to perform the current memory reclaim according to the memory reclaim time interval, in accordance with the user operation and use information and memory occupancy information of the currently executed application in the terminal, Decide which applications need to reclaim memory. Here, in order to make sure that the user normally uses the application, the memory reclaim is not considered for the application currently used by the user. The user's current application may include a foreground application, or may include an application running in the background, such as a file download.

S304: The memory reclaim interface provided by kernel mode is called to perform memory reclaim.

In a specific implementation, if it is determined that the memory reclaim time has been reached in accordance with the determined memory reclaim time interval, if the current time is not within a time range in which the user is likely to use the application, , The memory of the application that is not currently used or operated by the user is reclaimed. In this way, the memory reclaim target application is successfully selected until the memory reclaim end condition is satisfied.

In one implementation, after it is determined that a memory reclaim is currently needed to be performed, an application that is currently running on the terminal and is not manipulated by the user may be selected in accordance with a pre-stored priority order of applications that are to be memory reclaimed have. Whether the current time is within a time segment with a high availability of the selected application (i.e., a time segment in which the user operation and probability of use of the application is relatively high) is determined based on user operation and usage information of the application (e.g., 13:00 for five consecutive days, and 12:00 to 13:00 is the high probability runtime segment of the application). If the current time is not within the high utilization time segment of the selected application, it is determined that the selected application is the application that will make the memory reclaim. The above steps are repeated until the memory reclaim end condition is satisfied. Here, the memory reclaim termination condition may include that the size of the system free memory is larger than a predetermined second threshold value.

The priority order may be a priority order among different application groups. Specifically, the applications installed in the terminal can be grouped according to the usage frequency of the applications, and the applications in the same group have the same use frequency range. The memory reclaim priority order of the applications of each group is determined according to the use frequency range corresponding to each group, and the applications of the same group have the same priority order. For example, some applications, such as a user interface (UI), may be associated with the core elements of the operating system within the terminal, and this type of application may be classified in group 1, and group 1 represents a very important application. For some applications that users frequently use, such as camcorders and cameras, this type of application can be categorized into Group 2, where Group 2 represents a largely critical application. For some infrequently used applications, such as calculators and stocks, this type of application can be classified as Group 3, while Group 3 is shown as non-critical. The memory reclaim priority of group 3> the memory reclaim priority of group 2> the memory reclaim priority of group 1. During the memory reclaim, the memory reclaim of the application of the group 3 is given the highest priority, the memory reclaim of the application of the group 2 is given the second priority, and the memory of the application of the group 1 is not reclaimed.

Example 3

To further optimize the memory reclaim policy to ensure timely and appropriate memory reclaim, embodiments of the present application additionally provide embodiments that perform memory reclaim using a plurality of memory reclaim conditions.

Referring to FIG. 4, FIG. 4 is a flowchart of a memory reclaim method according to a third embodiment of the present application, as a method for performing the following steps in the user mode.

S401: User operation and usage information and memory occupancy information of the application installed in the terminal are monitored.

S402: The memory reclaim time interval is determined according to the user operation and usage information and memory occupancy information provided in the terminal.

S403: Trigger the memory reclaim procedure of S404 when any one or more of the following conditions 1 to 4 are satisfied, and trigger the memory reclaim procedure of S405 when the condition 5 is satisfied.

1. Depending on the memory reclaim time interval, it is determined that the current memory reclaim must be performed.

In a specific implementation, whether a current memory reclaim should be performed can be determined with reference to system free memory. That is, when the memory reclaim time, which is indicated by the memory reclaim time interval, currently reaches, the system free memory is the threshold (this threshold may be a predetermined first threshold, a predetermined second threshold, or another threshold, The other threshold may be a threshold between the first threshold and the second threshold, and the first threshold is less than the second threshold).

2. It is determined that the system free memory is smaller than the predetermined first threshold value.

3. When it is detected that the application is started or switched to the foreground interface, it is determined that the current memory reclaim should be performed according to the memory occupancy information of the application and the size of the system free memory.

Here, if the size of the memory requested by the application newly started or switched to the foreground interface is larger than the system free memory, the memory reclaim is triggered.

4. The number of running applications M in the background is greater than the predetermined allowable number N of applications that can currently be run in the background.

In a specific implementation, the allowable number of applications that can be executed in the background may be set according to the size of the current system free memory.

5. It is detected by the application of the terminal that the period of stay in the background exceeds the predetermined period.

With respect to the above-mentioned condition 2-5, only a part of the condition may be selected according to the actual requirement, if it is an ordinary technician.

S404: determines an application to be memory reclaimed from an application that is not currently operated or used by the user as an application currently being executed in the terminal, based on the user operation and usage information and memory occupancy information of the application currently being executed in the terminal, The memory reclaim interface provided by the mode is called to perform the memory reclaim.

In a specific implementation, after a terminal system is started, a daemon for use in a memory claim in a user mode of the present application is first started, then an application is started, and as shown in Table 1 below, By keeping the table, the terminal records the memory occupancy status of the application and collects statistics on the high probability execution time segments.

application Occupied memory High Probability Run Time Segment App 1 x1KB T1-T2 App 2 x2KB T3-T4 App 3 x3KB T5-T6 App 4 x4KB T7-T8 ... ... ...

When a memory reclaim is to be performed, an application currently being executed in the terminal may be selected according to a pre-stored priority order of an application to be memory reclaimed. Referring to Table 1, it is determined whether the current time is within the high-probability time-of-use segment of the selected application. If the current time is not within the high availability time segment of the selected application, then the selected application is used as the application to make memory reclaim, and by calling the memory reclaim interface provided by kernel mode and used for memory reclaim, Claims are made, and the above steps are repeated until a memory reclaim termination condition is met. Here, based on the difference between the conditions 1 to 4, the aforementioned memory reclaim termination condition is satisfied when the size of the system free memory is larger than the predetermined second threshold value; The memory requested by the currently started application is smaller than the system free memory; When the memory required by the application switched to the foreground interface is smaller than the system free memory or when the number of applications running in the background is less than or equal to a predetermined allowable number of applications executable in the background can do. For example, for conditions 1 and 2, the memory reclaim termination condition may be the case where the size of the system free memory is greater than a predetermined second threshold (the predetermined second threshold is greater than a predetermined first threshold); For condition 3, the memory reclaim termination condition may be the case where the memory required by the currently started application is less than the system free memory; For condition 4, the memory reclaim termination condition may be the case where the number of applications running in the background is equal to a predetermined allowable number of applications executable in the background. That is, in step S303, M-N applications to be memory reclaimed are selected from applications running in the background.

S405: By calling the memory reclaim interface provided by the kernel mode, the memory of the application whose period of stay in the background exceeds the predetermined period is reclaimed.

Based on the same technical idea, the present application provides a memory reclaim device and user equipment corresponding to a memory reclaim method. Since the principles of this device and user equipment for solving the problem are similar to the memory reclaim method in the present application, reference may be made to implementation of the method for implementation of this device and user equipment. Repeated parts are not explained again.

Example 4

5, a memory re-claim device 50 is a schematic configuration diagram of a memory re-claim device 50 according to an embodiment of the present application. The memory re-

A determination module (51) configured to monitor user operation and usage information and memory occupancy information of an application installed in the terminal in a user mode; And

If the memory reclaim condition is determined to be satisfied at present according to at least one of the user operation and use information or memory occupancy information of the application installed in the terminal, user operation and use information of an application currently being executed in the terminal, A memory reclaim module configured to determine an application to be memory reclaimed among currently running applications in the terminal according to the memory occupancy information and to perform a memory reclaim by calling a memory reclaim interface provided by the kernel mode 52)

.

In the present application, the memory reclaim is preemptively performed by monitoring the user operation and the usage state and the memory occupation state of the application installed in the terminal in the user mode, whereby the application is frequently operated and used by the user, If occupied, the frequency of memory reclaim increases, ensuring normal use of the memory.

Alternatively, the memory reclaim module 52 may be,

Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal, and when the current time reaches a memory reclaim time indicated by the memory reclaim time interval, It is configured to determine that the memory reclaim condition is currently satisfied.

In this implementation, the memory reclaim module 52 first determines a memory reclaim time interval in accordance with the regularity of the user's application usage, and then determines the memory reclaim time interval according to the memory reclaim time interval indicated by the memory reclaim time interval . In this way, a planned reclaim is performed on the memory, thereby allowing the available free memory in the terminal to be maintained at a relatively appropriate level.

Optionally, the memory reclaim module 52 specifically includes the following steps:

Individually determining user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the terminal; And

A memory reclaim time interval within each time segment is determined according to user operation and usage information and memory occupancy information in each time segment of an application installed in the terminal during each of the at least one predetermined time segment Steps to be individually determined

To determine a memory reclaim time interval according to the memory reclaim time interval.

The frequency with which a user manipulates and uses an application is different in different time segments. Thus, in this manner, different memory reclaim time intervals may be used in different time segments. This further improves the timeliness of memory reclaim and also avoids wasting system resources caused by frequent execution of unnecessary memory reclaim procedures.

Optionally, the memory reclaim module 52 is specifically configured to determine that the memory reclaim condition is currently satisfied if it is determined that the system free memory is less than a predetermined first threshold.

In this way, memory insufficiency can be avoided to some extent.

Alternatively, the memory reclaim module 52 may be,

When it is detected that the application is started or switched to the foreground interface, it is determined whether to perform the memory reclaim according to the memory occupancy information of the application and the size of the system free memory,

When a memory reclaim is to be performed, it is configured to determine that the memory reclaim condition is currently satisfied.

The newly started application or the application switched to the foreground interface is usually an application that the user is about to use. In this way, normal execution of the newly started application or the application switched to the foreground interface is guaranteed, Experience can be improved.

Alternatively, the memory reclaim module 52 may be,

If the number of currently running applications in the background exceeds a predetermined allowable number of applications that can be executed in the background, it is determined that the memory reclaim condition is currently satisfied.

Here, the number of applications permitted to be executed in the background can be set for the time interval according to the size of the current free memory. Because applications running in the background are not typically the applications the user is currently using, limiting the number of these applications can avoid excessive memory occupation.

Alternatively, the memory reclaim module 52 may be,

Selects an application that is not operated or used by a user as an application currently being executed in the terminal according to a pre-stored priority order of the application to be memory reclaimed, and determines that the current time is a high-probability usage time segment probability use time segment of the selected application, wherein the high-probability usage time segment of the application is determined based on user operation and usage information of the application, and wherein the current time is within a high- Determining that the selected application is an application to be memory reclaimed and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And

Repeating the step until the memory reclaim termination condition is satisfied

To perform a memory reclaim.

In this way, a memory of an application with a relatively low priority (this application is usually not an application that a user frequently uses) is preferentially selected as a reclaim target. Where the current time is not within the high-probability runtime segment of the application, thereby improving system performance and improving the user experience.

Optionally, the memory reclaim termination condition is the following:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

Alternatively, the memory reclaim module 52 may be,

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And

Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;

And to set a priority order of the applications that are required to make a memory reclaim according to the priority order.

Alternatively, the memory reclaim module 52 may be,

Determining that the memory reclaim condition is currently satisfied if it is detected that the application in the terminal is in the background for a predetermined period of time, calling the memory reclaim interface provided by the kernel mode, And resumes a memory of an application in which a period of stay in a predetermined period exceeds a predetermined period.

Here, an application in which a period of staying in the background is relatively long is an application which is not normally operated by a user during the current period, and the memory of this application is released and provided to an application that needs more memory, thereby improving the effective utilization rate of the memory .

Example 5

6 is a schematic diagram of a user equipment 60 according to an embodiment of the present application and the user equipment 60 includes a processor 61, a memory 62 and a bus 63 . The memory 62 is configured to store an execution command and includes an internal memory device 621 and an external memory device 622. [ Here, the internal memory device 621 is also referred to as an internal memory, and is configured to temporarily store operation data of the processor 61 and data exchanged with the external memory 622 such as a hard disk. The processor 61 exchanges data with the external memory 622 using the internal memory device 621 and the processor 61 and the memory 62 communicate with the bus 63 when the user equipment 60 is executed. , The processor 61 executes the following commands in the user mode:

Monitoring user operation and usage information and memory occupancy information of an application installed in the terminal; And a user operation and use information of an application currently being executed in the terminal if the memory reclaim condition is determined to be satisfied according to at least one of user operation and usage information or memory occupancy information of the application installed in the terminal, Determining an application to be memory reclaimed from currently running applications in the terminal according to memory occupancy information, and executing a memory reclaim by calling a memory reclaim interface provided by the kernel mode.

Optionally, in the instruction executed by the process 61, it is determined that the memory reclaim condition is currently satisfied, in accordance with at least one of the user operation and use information and the memory occupancy information of the application installed in the terminal, Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal; And determining that the memory reclaim condition is currently satisfied when the current time has reached a memory reclaim time indicated by the memory reclaim time interval.

Optionally, in a command executed by the processor 61, a selectable method of determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal, Individually determining user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the application; And for each of the at least one predetermined time segment, a memory reclaim time in each time segment, in accordance with user operation and usage information and memory occupancy information in the respective time segment of an application installed in the terminal, And determining the interval individually.

Optionally, in the instructions executed by the processor 61, determining that the memory reclaim condition is currently satisfied, according to the memory occupancy information of the application installed in the terminal, means that the system free memory is less than the predetermined first threshold Determining that the memory reclaim condition is currently satisfied.

Optionally, in the instruction executed by the processor 61, it is determined that the memory reclaim condition is currently satisfied, in accordance with the user operation and use information and the memory occupancy information of the application installed in the terminal, Determining whether to perform a memory reclaim according to the memory occupancy information of the application and the size of the system free memory when the switching to the foreground interface is detected; And if it is necessary to perform a memory reclaim, determining that the memory reclaim condition is currently satisfied.

Optionally, in the instruction executed by the processor 61, it is determined that the memory reclaim condition is currently satisfied in accordance with the user operation and usage information of the application installed in the terminal, Determining that the memory reclaim condition is currently satisfied if the predetermined allowable quantity of applications that can be executed in the background is exceeded.

Here, the allowed number of applications that can be executed in the background can be set in the time interval according to the size of the current free memory. Applications running in the background are typically not currently used by users, so unnecessary excessive memory occupation can be avoided by limiting the quantity of these applications.

Optionally, in an instruction executed by the processor 61, a selectable method of determining an application to be subjected to the memory reclaim and performing a memory reclaim by invoking a memory reclaim interface provided by the kernel mode Selects an application that is not operated or used by a user as an application that is currently being executed in the terminal according to a pre-stored priority order of applications to be memory-reclaimed, and the current time is the high- Probability use time segment, wherein the high-probability usage time segment of the application is determined based on user operation and usage information of the application, and wherein the current time is a high probability usage of the selected application Determining that the selected application is a memory reclaim application if it is not in the time segment and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And repeating the steps until the memory reclaim termination condition is satisfied.

Optionally, the memory reclaim termination condition is one of the following conditions:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

Optionally, in an instruction executed by the processor, the order of priority of an application that needs to make a memory reclaim is the next step:

Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And

Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;

.

Optionally, in a command executed by the processor, when it is determined that the memory reclaim condition is satisfied, according to the user operation and usage information of the application installed in the terminal, the memory reclaim interface provided by the kernel mode is called Wherein the memory reclaiming step determines that the memory reclaim condition is currently satisfied when it is detected that the period in which the application at the terminal remains in the background exceeds a predetermined period of time, And reclaiming a memory of an application whose period of stay in the background exceeds a predetermined period by calling the memory reclaim interface.

Example 6

7 illustrates a structure of a terminal device 700 according to the present application and includes at least one processor 701, at least one network interface 704 or other user interface 703, A memory 705, and at least one communication bus 702. [ Communication bus 702 is configured to implement connection and communication between components. Here, the memory 705 includes an internal memory device and an external memory device. The internal memory device is also referred to as an internal memory, and temporarily stores operation data of the processor 701 and data exchanged with an external memory such as a hard disk. The processor 701 exchanges data with an external memory using an internal memory device.

Memory 705 stores the following elements, executable modules or data results or portions thereof, or an extended set.

The operating system 7051 includes several system programs and may have two execution levels, kernel mode 7051a and user mode 7051b. When a process executes a system call and executes kernel code for execution, the process is in kernel run mode, which is also referred to as kernel mode. When a process is in kernel mode, the running kernel code uses the current process's kernel stack, and each process has its own kernel stack. When a process executes your kernel code, this process is in user-executable mode, which is also referred to as user-mode. In this case, the processor 701 operates in user code, whose privilege level is lowest.

The application program module 7052 includes a plurality of application programs (applications for short).

Monitoring user operation and usage information and memory occupancy information of an application installed in the terminal; And a user operation and use information of an application currently being executed in the terminal if the memory reclaim condition is determined to be satisfied according to at least one of user operation and usage information or memory occupancy information of the application installed in the terminal, Determining an application to be memory reclaimed from currently running applications in the terminal according to memory occupancy information, and executing a memory reclaim by calling a memory reclaim interface provided by the kernel mode.

Optionally, in one embodiment, the processor 701 further determines a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal, And to determine that the memory reclaim condition is currently satisfied when the memory reclaim time indicated by the claim time interval is reached.

The processor 701 may also separately determine user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the terminal and determine whether the at least one predetermined time segment During each of the time segments, a memory reclaim time interval in each time segment according to user operation and usage information and memory occupancy information of each time segment of the application installed in the terminal.

Optionally, in another embodiment, processor 701 is further configured to determine that the memory reclaim condition is currently satisfied if it is determined that the system free memory is less than a predetermined first threshold.

Optionally, in yet another embodiment, processor 701 may also be configured to, if detected to be an application initiated or switched to a foreground interface, generate a memory reclaim according to the memory occupancy information of the application and the size of the system free memory And to determine that the memory reclaim condition is currently satisfied if the memory reclaim is to be performed.

Alternatively, in another embodiment, the processor 701 may also determine that a memory reclaim condition is currently satisfied if the number of applications currently running in the background exceeds a predetermined allowable number of applications that can be executed in the background .

Here, the number of applications permitted to be executed in the background can be set for the time interval according to the size of the current free memory. Because applications running in the background are not typically the applications the user is currently using, limiting the number of these applications can avoid excessive memory occupation.

Optionally, in yet another embodiment, processor 701 may also include an application that is not currently operated or used by the user as an application currently running on the terminal, in accordance with a pre-stored priority order of the application to be memory reclaimed And determines if the current time is within a high-probability use time segment of the selected application, wherein the high-probability usage time segment of the application is based on user operation and usage information of the application Determining that the selected application is an application to be memory reclaimed if the current time is not within a high probability usage time segment of the selected application, By calling a scan performing a reclaim memory; And repeating the steps until the memory reclaim termination condition is met, to determine an application to perform a memory reclaim and to perform a memory reclaim.

Memory reclaim termination conditions are as follows:

When the size of the system free memory is larger than a predetermined second threshold value;

When the memory requested by the currently started application is smaller than the system free memory;

The memory required by the application switched to the foreground interface is smaller than the system free memory; And

If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background

&Lt; / RTI &gt;

In addition, the processor 701 groups the applications installed in the terminal according to the frequency of use of the applications, and the applications in the same group have the same use frequency range; And determine a memory re-claim priority order of the application in each group according to a frequency range of use corresponding to each group. Here, applications in the same group have the same priority order.

Alternatively, in another embodiment, the processor 701 may further determine that the memory reclaim condition is currently satisfied if it is detected that the period of time the application at the terminal has stayed in the background exceeds a predetermined period, The memory reclaim interface provided by the kernel mode is called so that the memory of the application whose period of stay in the background exceeds the predetermined period is reclaimed.

In addition, the terminal device 700 may perform the method and the embodiment in Figs. 2 to 4, and a detailed description thereof will not be described again in the present embodiment of the present application.

It will be appreciated that, using the solutions described above, the frequency of memory reclaim increases when an application is frequently manipulated and used by a user and occupies a relatively large memory, thereby ensuring normal use of the memory.

Example 7

The embodiment of the present application relates to a terminal 800 and a memory reclaim method and the terminal 800 can be a mobile phone, a tablet, a PDA (Personal Digital Assistant), a POS (Point of Sales) .

8 is a schematic configuration diagram of a terminal 800 according to an embodiment of the present application.

8, a terminal 800 in this embodiment of the present application includes a processor 810, a memory 820, an input unit 830, a power supply 850, a radio frequency (RF) circuit 860, An audio frequency circuit 870, and a WiFi module 880.

The memory 820 includes an internal memory device 821 and an external memory 822. The internal memory device 821 is configured to temporarily store operational data of the processor 810 and data exchanged with an external memory 822, such as a hard disk. The processor 810 exchanges data with the external memory 822 using the internal memory device 810. The internal memory device 821 may be one of a non-volatile random access memory (NVRAM), a dynamic random access memory (DRAM), a static random access memory (SRAM), or a flash memory and the external memory 822 may be a hard disk, Optical disk, USB flash drive, floppy disk, or tape drive.

The processor 810 executes a command in the memory in the user mode to monitor user operation and usage information and memory occupancy information of the application installed in the terminal and displays user operation and usage information of the application installed in the terminal, If it is determined that the memory reclaim condition is satisfied at present according to at least one of the occupancy information, the information about the currently operating application currently running on the terminal, according to the user operation and usage information, Determines which applications need to be memory reclaimed, and invokes the memory reclaim interface provided by kernel mode to perform memory reclaim. The memory re-claim may be triggered by a predetermined memory reclaim time interval, specifically, the processor 810 may store the user operation and usage information and memory occupancy information of the application installed in the terminal at at least one predetermined time interval And for each time segment of the at least one predetermined time segment, determining, for each time segment of the at least one predetermined time segment, a memory reclaim in the time segment in accordance with user operation and usage information and memory occupancy information of the application installed in the terminal, The time intervals are determined individually. Optionally, if it is determined that the system free memory is less than a predetermined first threshold, a memory reclaim can also be triggered. The memory reclaim can also be triggered, depending on the memory occupancy information of the application and the size of the system free memory, if the application is started or switched to the foreground interface is detected. The memory reclaim condition may also be triggered if the number of currently running applications in the background exceeds a predetermined allowable number of applications that can be executed in the background. Also, the number of applications permitted to run in the background here can be set for the time interval according to the size of the current free memory. Because applications running in the background are not typically the applications the user is currently using, limiting the number of these applications can avoid excessive memory occupation.

Alternatively, based on the trigger condition described above, the process by which the processor 810 performs the memory claim may include, in accordance with a pre-stored priority order of the application to be memory reclaimed, Selecting an application that is not manipulated or used by the application and determining if the current time is within a high-probability use time segment of the selected application, wherein the high- Determining whether the selected application is an application to be memory reclaimed if the current time is not within a high probability usage time segment of the selected application; Performing a memory reclaim by calling a memory reclaim interface provided by the memory reclaim interface; And repeating the above steps until the memory reclaim end condition is satisfied. Further, the memory reclaim termination condition is satisfied when the size of the system free memory is larger than a predetermined second threshold value; When the memory requested by the currently started application is smaller than the system free memory; The memory required by the application switched to the foreground interface is smaller than the system free memory; And a case where the number of applications running in the background is equal to or less than a predetermined allowable number of applications that can be executed in the background. In addition, the applications installed in the terminal are grouped according to the frequency of use of the applications, wherein the applications in the same group have the same frequency of use. In each group, the application's memory reclaim priority order is determined according to the use frequency range corresponding to each group, and applications in the same group have the same priority order.

In addition, the processor 810 invokes the memory reclaim interface provided by kernel mode to execute the memory reclaim if it is determined that the memory reclaim condition is currently satisfied.

The input unit 830 receives input number or character information and generates a signal input relating to user setting and function control of the terminal 800. [ Specifically, in this embodiment of the present application, the input unit 830 may include a touch panel 831. [ The touch panel 831 may also be a touch screen, and may be a touch operation performed by a user on or near the touch panel, such as a stylus, on or near the touch panel 831, Such as operations performed with a finger, are collected, and the corresponding connection device is driven according to a preset program. Alternatively, the touch panel 831 includes two parts, the touch detection device and the touch controller. The touch detection device detects the touch movement of the user, detects a signal caused by the touch operation, and sends the signal to the touch controller. The touch controller receives the touch information from the touch detection device, converts the touch information to touch coordinates, transmits the touch coordinates to the processor 810, receives the command transmitted by the processor 810, . The touch panel 831 may be implemented in various forms such as a resistance type, a capacitive type, an infrared type, and a surface acoustic wave type. In addition to the touch panel 831, the input unit 830 may include one or more other input devices 832, which may include, but are not limited to, a physical keyboard, a function key Volume keys and on / off keys, etc.), trackballs, mice, joysticks, and the like.

The terminal 800 may further include a display unit 840 that displays various menu interfaces of the terminal 800 as well as information provided for the user or information entered by the user The display unit 840 may include a display panel 841. [ Alternatively, an LCD, an OLED, or the like may be used to form the display panel 841.

In this embodiment of the present application, the touch panel 831 covers the display panel 841 to configure a touch display screen. Upon detecting a touch operation on or near the touch display screen, the touch display screen transmits a touch operation to the processor 810 to determine the type of touch event, and then the processor 810 transmits the corresponding visual output to the touch It is output on the touch display screen according to the event type.

In this embodiment of the present application, the touch display screen includes an application interface display area and a common control display area. The arrangement manner of the application interface display area and the common control display area is not limited and the two display areas can be arranged in a top-down arrangement or a left-right arrangement. The application interface display area can be used to display an application program interface. Each interface may include an interface element, such as an icon or a home screen widget or both, of at least one application program. The application interface display area may also be an empty interface with no content. The common control display area can be used to display control for a relatively high-use application program icon, such as a set button, a number of interfaces, a scroll bar, a phonebook icon, and the like.

The processor 810 is a control center of the terminal 800 and connects various parts of the entire mobile phone using various interfaces and lines. The processor 810 executes various functions of the terminal 800 and processes the data by executing the software program or module stored in the internal memory device 821 and calling the data stored in the external memory 822, Gt; 800 &lt; / RTI &gt;

It will be appreciated by those of ordinary skill in the art that the embodiments of the present application may be provided as a method, system, or computer program product. Thus, the present application may utilize only hardware-specific embodiments, software-only embodiments, or combinations of software and hardware embodiments. In addition, the present application is embodied in a storage medium (including, but not limited to, disk memory, CD-ROM, optical memory, etc.) usable in one or more computers containing program code usable in a computer.

The present application has been described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present application. Computer program instructions may be used to implement each processor and / or block within the flowchart and / or block diagrams, and combinations of processes and / or blocks within the flowcharts and / or block diagrams. These computer program instructions may be executed by a processor of a general purpose computer, a special purpose computer, an embedded processor, or any other programmable data processing apparatus to create a machine, such that a computer or other programmable data processing apparatus may be used by one or more processors and / Thereby enabling to create devices for implementing specific functions in one or more blocks within the diagram.

These computer program instructions may also be stored in a computer-readable memory that directs a computer or other programmable data processing apparatus to operate in a particular manner so that the instructions stored in the computer-readable memory may cause an artifact . An instruction device implements a particular function within one or more blocks within one or more processes and / or block diagrams in the flowchart.

Such computer program instructions may also be loaded into a computer or other programmable data processing apparatus whereby a series of operations and steps are performed on the computer or other programmable data processing apparatus to produce processing implemented by the computer. Thus, instructions executed on a computer or other programmable data processing apparatus provide steps for implementing particular functions within one or more blocks within one or more processes and / or block diagrams in the flowchart.

While a few preferred embodiments of the present application have been described, it will be appreciated by those of ordinary skill in the art that modifications and variations may be made thereto as long as they acquire basic concepts. Therefore, it should be understood that such preferred embodiments and all changes and modifications are within the scope of protection of the present application by interpretation of the following claims.

Obviously, many modifications and variations of the present invention can be made by those skilled in the art without departing from the spirit and scope of the invention. In this case, the present application should be understood as including modifications and variations of the present application, as long as they fall within the scope of protection defined by the claims of the present application and equivalents thereof.

Claims (20)

As a memory reclaim method,
Monitoring user operation and usage information and memory occupancy information of an application installed in the terminal; And
If it is determined that the memory reclaim condition is currently satisfied in accordance with at least one of the user operation and use information or memory occupancy information of the application installed in the terminal,
Determining an application to be subjected to a memory reclaim among applications currently being executed in the terminal according to user operation and use information and memory occupancy information of an application currently being executed in the terminal and generating a memory reclaim Steps to invoke an interface to perform a memory reclaim
To run in user mode
Memory reclaim method. The method according to claim 1,
Determining that the memory reclaim condition is currently satisfied in accordance with at least one of the user operation and usage information and the memory occupancy information of the application installed in the terminal,
Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal; And
Determining that the memory reclaim condition is currently satisfied when the current time has reached a memory reclaim time indicated by the memory reclaim time interval
The method comprising the steps of: 3. The method of claim 2,
The step of determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal,
Individually determining user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the terminal; And
For each of the at least one predetermined time segment, a memory reclaim time interval in each time segment, in accordance with user operation and usage information and memory occupancy information in each time segment of an application installed in the terminal &Lt; / RTI &gt;
The method comprising the steps of: The method according to claim 1,
Determining that the memory reclaim condition is currently satisfied based on the memory occupancy information of the application installed in the terminal,
Determining that the memory reclaim condition is currently satisfied if it is determined that the system free memory is less than a predetermined first threshold,
Memory reclaim method. The method according to claim 1,
Determining that the memory reclaim condition is currently satisfied based on the user operation and use information and the memory occupancy information of the application installed in the terminal,
Determining whether to perform a memory reclaim according to the memory occupancy information of the application and the size of the system free memory when the application is started or switching to the foreground interface is detected; And
If it is necessary to perform a memory reclaim, the step of determining that the memory reclaim condition is currently satisfied
The method comprising the steps of: The method according to claim 1,
Determining that the memory reclaim condition is currently satisfied in accordance with user operation and usage information of an application installed in the terminal,
Determining that a memory reclaim condition is currently satisfied if the number of applications currently running in the background exceeds a predetermined allowable number of applications that can be executed in the background,
Memory reclaim method. 7. The method according to any one of claims 2 to 6,
Determining an application to which the memory reclaim is to be made, and invoking a memory reclaim interface provided by the kernel mode to perform a memory reclaim,
Selects an application that is not operated or used by a user as an application currently being executed in the terminal according to a pre-stored priority order of the application to be memory reclaimed, and determines that the current time is a high-probability usage time segment probability use time segment of the selected application, wherein the high-probability usage time segment of the application is determined based on user operation and usage information of the application, and wherein the current time is within a high- Determining that the selected application is an application to be memory reclaimed and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And
Repeating the step until the memory reclaim termination condition is satisfied
/ RTI &gt;
Memory reclaim method. 8. The method of claim 7,
The memory reclaim ending condition is the following condition:
When the size of the system free memory is larger than a predetermined second threshold value;
When the memory requested by the currently started application is smaller than the system free memory;
The memory required by the application switched to the foreground interface is smaller than the system free memory; And
If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background
&Lt; / RTI &gt;
Memory reclaim method. 9. The method according to claim 7 or 8,
The order of priority for applications that need to reclaim memory is as follows:
Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And
Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;
Lt; / RTI &gt;
Memory reclaim method. The method according to claim 1,
Wherein the step of calling a memory reclaim interface provided by the kernel mode to perform a memory reclaim when the memory reclaim condition is determined to be satisfied according to user operation and usage information of an application installed in the terminal,
Determining that the memory reclaim condition is currently satisfied if it is detected that the application in the terminal is in the background for a predetermined period of time, calling the memory reclaim interface provided by the kernel mode, Comprising: reclaiming a memory of an application whose period of stay in a predetermined period exceeds a predetermined period;
Memory reclaim method. A memory reclaim device,
A determination module configured to monitor user operation and use information and memory occupancy information of an application installed in the terminal in a user mode; And
If the memory reclaim condition is determined to be satisfied at present according to at least one of the user operation and use information or memory occupancy information of the application installed in the terminal, user operation and use information of an application currently being executed in the terminal, A memory reclaim module configured to determine an application to be memory reclaimed from currently running applications in the terminal according to the memory occupancy information and to perform a memory reclaim by calling a memory reclaim interface provided by the kernel mode,
And the memory requesting device. 12. The method of claim 11,
Specifically, the memory reclaim module includes:
Determining a memory reclaim time interval according to user operation and usage information and memory occupancy information of an application installed in the terminal, and when the current time reaches a memory reclaim time indicated by the memory reclaim time interval, Configured to determine that a memory reclaim condition is currently satisfied,
Memory reclaim device. 13. The method of claim 12,
The memory reclaim module specifically includes the following steps:
Individually determining user operation and usage information and memory occupancy information in each of at least one predetermined time segment of an application installed in the terminal; And
A memory reclaim time interval within each time segment is determined according to user operation and usage information and memory occupancy information in each time segment of an application installed in the terminal during each of the at least one predetermined time segment Steps to be individually determined
And to determine a memory reclaim time interval in accordance with the &lt; RTI ID = 0.0 &gt;
Memory reclaim device. 12. The method of claim 11,
The memory reclaim module is configured to conclude that the memory reclaim condition is currently satisfied if it is determined that the system free memory is less than a predetermined first threshold. 12. The method of claim 11,
Specifically, the memory reclaim module includes:
When it is detected that the application is started or switched to the foreground interface, it is determined whether to perform the memory reclaim according to the memory occupancy information of the application and the size of the system free memory,
And to determine that the memory reclaim condition is currently satisfied if the memory reclaim is to be performed,
Memory reclaim device. 12. The method of claim 11,
Specifically, the memory reclaim module includes:
Configured to determine that a memory reclaim condition is currently satisfied if the number of currently running applications in the background exceeds a predetermined allowed number of applications that can be executed in the background,
Memory reclaim device. 17. The method according to any one of claims 12 to 16,
Specifically, the memory reclaim module includes:
Selects an application that is not operated or used by a user as an application currently being executed in the terminal according to a pre-stored priority order of the application to be memory reclaimed, and determines that the current time is a high-probability usage time segment probability use time segment of the selected application, wherein the high-probability usage time segment of the application is determined based on user operation and usage information of the application, and wherein the current time is within a high- Determining that the selected application is an application to be memory reclaimed and performing a memory reclaim by calling a memory reclaim interface provided by the kernel mode; And
Repeating the step until the memory reclaim termination condition is satisfied
Configured to perform memory reclamation according to the &lt; RTI ID = 0.0 &gt;
Memory reclaim device. 18. The method of claim 17,
The memory reclaim ending condition is the following condition:
When the size of the system free memory is larger than a predetermined second threshold value;
When the memory requested by the currently started application is smaller than the system free memory;
The memory required by the application switched to the foreground interface is smaller than the system free memory; And
If the number of applications running in the background is less than or equal to the predetermined allowed number of applications that can run in the background
&Lt; / RTI &gt;
Memory reclaim device. The method according to claim 17 or 18,
Specifically, the memory reclaim module includes:
Grouping the applications installed in the terminal according to the usage frequency of the application, the applications in the same group having the same frequency of use range; And
Determining a memory re-claim priority order of an application in each group according to a use frequency range corresponding to each group; the applications in the same group have the same priority order;
Configured to set a priority order of applications that need to be memory reclaimed according to the priority of the application,
Memory reclaim device. 12. The method of claim 11,
Specifically, the memory reclaim module includes:
Determining that the memory reclaim condition is currently satisfied if the period in which the application at the terminal is staying in the background exceeds a predetermined period of time and calling the memory reclaim interface provided by the kernel mode, The memory of the application having a period of stay in a predetermined period exceeding a predetermined period,
Memory reclaim device.

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